While enjoying a fabulous party hosted by wealthy Joanna Tate, Nancy finds herself investigating a major jewel theft. Joanna’s newest prize — a diamond and ruby necklace — is missing. And since Joanna hasn’t kept the necklace a secret, Nancy has plenty of suspects.

Her chief problem is rookie police detective John Ryan, who wants to nab the thief himself. But a rash of copycat robberies — and some devilishly original murder attempts — convince Nancy to collar the country club burglar right away…or pay dearly later.